Vulnerability-Lookup

CVE-2026-107728 (GCVE-0-2026-107728)

Vulnerability from cvelistv5 – Published: 2026-10-08 22:13 – Updated: 2026-10-14 01:31

Title

Strawberry GraphQL: Synchronous permission checks can treat an awaitable authorization result as truthy

Summary

Strawberry GraphQL is a library for creating GraphQL APIs. From 0.217.0 until 0.326.1, PermissionExtension.resolve() on a synchronous field resolver evaluates the result of has_permission() for truthiness. When a custom permission declares has_permission() as a normal function but returns an awaitable, supports_sync does not classify it as asynchronous, the awaitable is not awaited, and its inherently truthy object value permits the protected resolver to run even when the result would resolve to false. This affects synchronous field resolvers under both execute_sync() and execute(); permissions declared with async def has_permission() and synchronous permissions returning a boolean are not affected. This issue is fixed in version 0.326.1.

Severity

7.5 (High)


                        
                          CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N

SSVC

Exploitation: poc Automatable: yes Technical Impact: partial

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2026-10-14 01:30 UTC

CWE

CWE-863 - Incorrect Authorization

Assigner

GitHub_M CNA under the mitre root

CNA scorecard C 72/100 over 7613 records in the last 180 days details

References

4 references

URL	Tags
https://github.com/strawberry-graphql/strawberry/…	x_refsource_CONFIRM
https://github.com/strawberry-graphql/strawberry/…	x_refsource_MISC
https://github.com/strawberry-graphql/strawberry/…	x_refsource_MISC
https://github.com/strawberry-graphql/strawberry/…	x_refsource_MISC

Impacted products

1 product

Vendor	Product	Version	CPE status
strawberry-graphql	strawberry	Affected: >= 0.217.0, < 0.326.1	guessed

Show details on NVD website

JSON

To clipboard

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FKIE_CVE-2026-107728

Vulnerability from fkie_nvd - Published: 2026-10-08 23:16 - Updated: 2026-10-14 02:16

Severity

7.5 (High) - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N

Summary

References

	URL	Tags
	security-advisories@github.com	https://github.com/strawberry-graphql/strawberry/commit/2ebb79796c0e5ebb43cae1abd2b5a21363b1c00e
	security-advisories@github.com	https://github.com/strawberry-graphql/strawberry/pull/4605
	security-advisories@github.com	https://github.com/strawberry-graphql/strawberry/releases/tag/0.326.1
	security-advisories@github.com	https://github.com/strawberry-graphql/strawberry/security/advisories/GHSA-pfvf-fwfp-25mp
	134c704f-9b21-4f2e-91b3-4a467353bcc0	https://github.com/strawberry-graphql/strawberry/security/advisories/GHSA-pfvf-fwfp-25mp

Impacted products

	Vendor	Product	Version

JSON

To clipboard

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          "product": "strawberry",
          "vendor": "strawberry-graphql",
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    }
  ],
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  "lastModified": "2026-10-14T02:16:57.993",
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}

GHSA-PFVF-FWFP-25MP

Vulnerability from github – Published: 2026-10-09 14:07 – Updated: 2026-10-09 14:07

Summary

Strawberry GraphQL: Synchronous permission checks can treat an awaitable authorization result as truthy

Details

Summary

PermissionExtension.resolve() evaluates the return value of has_permission() for truthiness on the synchronous path. supports_sync only classifies a permission as asynchronous when has_permission is declared with async def (via inspect.iscoroutinefunction), so a plain def that returns an awaitable is treated as synchronous. An awaitable is always truthy, so the check passes even when it resolves to False and the protected resolver runs.

The resolve path is chosen by the field resolver, not by the execution method, so any field with a synchronous resolver is affected under both execute_sync() and execute(). Permissions declared with async def has_permission(), or a plain def returning a boolean, are not affected.

Details

The affected code is PermissionExtension.resolve() in strawberry/permission.py. A permission attached to a field whose has_permission is a normal def returning an awaitable reaches this path; the awaitable is never awaited and its truthiness grants access. resolve_async() is not affected because it uses await_maybe().

PoC

import strawberry
from strawberry.permission import BasePermission


class DenyViaAwaitable(BasePermission):
    message = "denied"

    def has_permission(self, source, info, **kwargs):
        async def result():
            return False

        return result()


@strawberry.type
class Query:
    @strawberry.field(permission_classes=[DenyViaAwaitable])
    def secret(self) -> str:
        return "secret"


schema = strawberry.Schema(Query)
print(schema.execute_sync("{ secret }").data)  # {'secret': 'secret'} instead of a permission error

Impact

An application using a custom permission whose has_permission is a normal def returning an awaitable can unintentionally grant access to the protected field. Standard permissions (a def returning a boolean, or an async def) are not affected, so exploitability depends on the application using this specific permission shape.

Fix

The synchronous path now fails closed: if has_permission() returns an awaitable, an error is raised instead of granting access.

Severity

7.5 (High)


                  
                    CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N

Show details on source website

JSON

To clipboard

{
  "affected": [
    {
      "database_specific": {
        "last_known_affected_version_range": "\u003c= 0.326.0"
      },
      "package": {
        "ecosystem": "PyPI",
        "name": "strawberry-graphql"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0.217.0"
            },
            {
              "fixed": "0.326.1"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "aliases": [
    "CVE-2026-107728"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-863"
    ],
    "github_reviewed": true,
    "github_reviewed_at": "2026-10-09T14:07:16Z",
    "nvd_published_at": "2026-10-08T23:16:58Z",
    "severity": "HIGH"
  },
  "details": "### Summary\n\n`PermissionExtension.resolve()` evaluates the return value of `has_permission()` for truthiness on the synchronous path. `supports_sync` only classifies a permission as asynchronous when `has_permission` is declared with `async def` (via `inspect.iscoroutinefunction`), so a plain `def` that returns an awaitable is treated as synchronous. An awaitable is always truthy, so the check passes even when it resolves to `False` and the protected resolver runs.\n\nThe resolve path is chosen by the field resolver, not by the execution method, so any field with a synchronous resolver is affected under both `execute_sync()` and `execute()`. Permissions declared with `async def has_permission()`, or a plain `def` returning a boolean, are not affected.\n\n### Details\n\nThe affected code is `PermissionExtension.resolve()` in `strawberry/permission.py`. A permission attached to a field whose `has_permission` is a normal `def` returning an awaitable reaches this path; the awaitable is never awaited and its truthiness grants access. `resolve_async()` is not affected because it uses `await_maybe()`.\n\n### PoC\n\n```python\nimport strawberry\nfrom strawberry.permission import BasePermission\n\n\nclass DenyViaAwaitable(BasePermission):\n    message = \"denied\"\n\n    def has_permission(self, source, info, **kwargs):\n        async def result():\n            return False\n\n        return result()\n\n\n@strawberry.type\nclass Query:\n    @strawberry.field(permission_classes=[DenyViaAwaitable])\n    def secret(self) -\u003e str:\n        return \"secret\"\n\n\nschema = strawberry.Schema(Query)\nprint(schema.execute_sync(\"{ secret }\").data)  # {\u0027secret\u0027: \u0027secret\u0027} instead of a permission error\n```\n\n### Impact\n\nAn application using a custom permission whose `has_permission` is a normal `def` returning an awaitable can unintentionally grant access to the protected field. Standard permissions (a `def` returning a boolean, or an `async def`) are not affected, so exploitability depends on the application using this specific permission shape.\n\n### Fix\n\nThe synchronous path now fails closed: if `has_permission()` returns an awaitable, an error is raised instead of granting access.",
  "id": "GHSA-pfvf-fwfp-25mp",
  "modified": "2026-10-09T14:07:17Z",
  "published": "2026-10-09T14:07:16Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://github.com/strawberry-graphql/strawberry/security/advisories/GHSA-pfvf-fwfp-25mp"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-107728"
    },
    {
      "type": "WEB",
      "url": "https://github.com/strawberry-graphql/strawberry/pull/4605"
    },
    {
      "type": "WEB",
      "url": "https://github.com/strawberry-graphql/strawberry/commit/2ebb79796c0e5ebb43cae1abd2b5a21363b1c00e"
    },
    {
      "type": "PACKAGE",
      "url": "https://github.com/strawberry-graphql/strawberry"
    },
    {
      "type": "WEB",
      "url": "https://github.com/strawberry-graphql/strawberry/releases/tag/0.326.1"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N",
      "type": "CVSS_V3"
    }
  ],
  "summary": "Strawberry GraphQL: Synchronous permission checks can treat an awaitable authorization result as truthy"
}

PYSEC-2026-4303

Vulnerability from pysec - Published: 2026-10-15 10:22 - Updated: 2026-10-15 14:38

Details

Summary

Details

PoC

import strawberry
from strawberry.permission import BasePermission


class DenyViaAwaitable(BasePermission):
    message = "denied"

    def has_permission(self, source, info, **kwargs):
        async def result():
            return False

        return result()


@strawberry.type
class Query:
    @strawberry.field(permission_classes=[DenyViaAwaitable])
    def secret(self) -> str:
        return "secret"


schema = strawberry.Schema(Query)
print(schema.execute_sync("{ secret }").data)  # {'secret': 'secret'} instead of a permission error

Impact

Fix

The synchronous path now fails closed: if has_permission() returns an awaitable, an error is raised instead of granting access.

Severity

7.5 (High)


                  
                    CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N

Impacted products

Name	purl
strawberry-graphql	pkg:pypi/strawberry-graphql

Aliases

JSON

To clipboard

{
  "affected": [
    {
      "package": {
        "ecosystem": "PyPI",
        "name": "strawberry-graphql",
        "purl": "pkg:pypi/strawberry-graphql"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0.217.0"
            },
            {
              "fixed": "0.326.1"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "0.217.0",
        "0.217.1",
        "0.218.0",
        "0.218.0.dev1705418681",
        "0.218.1",
        "0.219.0",
        "0.219.1",
        "0.219.2",
        "0.220.0",
        "0.220.0.dev1709543239",
        "0.221.0",
        "0.221.0.dev1710955937",
        "0.221.1",
        "0.222.0",
        "0.223.0",
        "0.224.0",
        "0.224.0.dev1711748192",
        "0.224.1",
        "0.224.2",
        "0.225.0",
        "0.225.1",
        "0.226.0",
        "0.226.1",
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  ],
  "aliases": [
    "CVE-2026-107728",
    "GHSA-pfvf-fwfp-25mp"
  ],
  "details": "### Summary\n\n`PermissionExtension.resolve()` evaluates the return value of `has_permission()` for truthiness on the synchronous path. `supports_sync` only classifies a permission as asynchronous when `has_permission` is declared with `async def` (via `inspect.iscoroutinefunction`), so a plain `def` that returns an awaitable is treated as synchronous. An awaitable is always truthy, so the check passes even when it resolves to `False` and the protected resolver runs.\n\nThe resolve path is chosen by the field resolver, not by the execution method, so any field with a synchronous resolver is affected under both `execute_sync()` and `execute()`. Permissions declared with `async def has_permission()`, or a plain `def` returning a boolean, are not affected.\n\n### Details\n\nThe affected code is `PermissionExtension.resolve()` in `strawberry/permission.py`. A permission attached to a field whose `has_permission` is a normal `def` returning an awaitable reaches this path; the awaitable is never awaited and its truthiness grants access. `resolve_async()` is not affected because it uses `await_maybe()`.\n\n### PoC\n\n```python\nimport strawberry\nfrom strawberry.permission import BasePermission\n\n\nclass DenyViaAwaitable(BasePermission):\n    message = \"denied\"\n\n    def has_permission(self, source, info, **kwargs):\n        async def result():\n            return False\n\n        return result()\n\n\n@strawberry.type\nclass Query:\n    @strawberry.field(permission_classes=[DenyViaAwaitable])\n    def secret(self) -\u003e str:\n        return \"secret\"\n\n\nschema = strawberry.Schema(Query)\nprint(schema.execute_sync(\"{ secret }\").data)  # {\u0027secret\u0027: \u0027secret\u0027} instead of a permission error\n```\n\n### Impact\n\nAn application using a custom permission whose `has_permission` is a normal `def` returning an awaitable can unintentionally grant access to the protected field. Standard permissions (a `def` returning a boolean, or an `async def`) are not affected, so exploitability depends on the application using this specific permission shape.\n\n### Fix\n\nThe synchronous path now fails closed: if `has_permission()` returns an awaitable, an error is raised instead of granting access.",
  "id": "PYSEC-2026-4303",
  "modified": "2026-10-15T14:38:11.496782Z",
  "published": "2026-10-15T10:22:54.407003Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://github.com/strawberry-graphql/strawberry/security/advisories/GHSA-pfvf-fwfp-25mp"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-107728"
    },
    {
      "type": "WEB",
      "url": "https://github.com/strawberry-graphql/strawberry/pull/4605"
    },
    {
      "type": "WEB",
      "url": "https://github.com/strawberry-graphql/strawberry/commit/2ebb79796c0e5ebb43cae1abd2b5a21363b1c00e"
    },
    {
      "type": "PACKAGE",
      "url": "https://github.com/strawberry-graphql/strawberry"
    },
    {
      "type": "WEB",
      "url": "https://github.com/strawberry-graphql/strawberry/releases/tag/0.326.1"
    },
    {
      "type": "PACKAGE",
      "url": "https://pypi.org/project/strawberry-graphql"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/advisories/GHSA-pfvf-fwfp-25mp"
    }
  ],
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N",
      "type": "CVSS_V3"
    }
  ],
  "summary": "Strawberry GraphQL: Synchronous permission checks can treat an awaitable authorization result as truthy"
}

Sightings

Author	Source	Type	Date	Other

Nomenclature

Seen: The vulnerability was mentioned, discussed, or observed by the user.
Confirmed: The vulnerability has been validated from an analyst's perspective.
Published Proof of Concept: A public proof of concept is available for this vulnerability.
Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
Not confirmed: The user expressed doubt about the validity of the vulnerability.
Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.

Vulnerability timeline

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The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base model, served locally by ML-Gateway. They have not been verified by an analyst and are provided for guidance only.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
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Action not permitted

CVE-2026-107728 (GCVE-0-2026-107728)

FKIE_CVE-2026-107728

GHSA-PFVF-FWFP-25MP

Summary

Details

PoC

Impact

Fix

PYSEC-2026-4303

Summary

Details

PoC

Impact

Fix

Tags

Sightings

Nomenclature

Vulnerability timeline

Related by attack behaviour